The application of this meter in Shanghai urban area is illustrated,and its importance in terms of the rod transformation management is analyzed.

Unified treatment of ultrasonic horn characteristics based on four-end network approach;

In order to enhance the material removal rate in ultrasonic machining,based on model analysis and harmonic response analysis of ANSYS,the shape and vibration length of the ultrasonic horn was optimized by using optimum design of ANSYS,and a new kind of ultrasonic horn with large amplitude ratio and satisfying promised stress was designed.

Ultrasonic horn is one of the most important parts in the ultrasonic oscillation, its primary effect in the oscillation system is to blow up the particle displacement and velocity in the mechanical vibrancy, centralize the ultrasonic energy on a lesser acreage.

The study of the performance of vibration energy transmission in the ultrasonic amplitude transformer;

Finite element analyses of the ultrasonic amplitude transformer

Key parts including piezoelectric transducer and amplitude transformer with a cylindrical hole in the center,and flexural vibration disk are analyzed and calculated.

It is on the principle of numerically-controlled process simulating and automaically create the 3-D soid model of pitch-varying spiral with the method of parameterized design .

The later expeiment had been done on Staphlococcus aureus、Pseudomonas aeruginusa、Escherachia coli、Klebsiella pneumoniae and Proteus vulgaris.

From the forms, growth and biochemical characteristics, we identified 8 isolates as Proteus vulgaris ,and 6 isolates as Morganella morganii.

on bacterial strains,Escherichia coli,Enterobacter aerogenes ,Proteus vulgaris,Bacillus subtilis,Staphylococcus epidermidis was tested.